Convert TG4 files online for free
The converter easily converts your TG4 file to various formats - free and online. No Photoshop or extra software needed.
The converter also works in reverse, so you can convert other Raster Image formats to TG4 with high quality output.
A .tg4 file is most often a Technical Graphics file or Tiled Group 4 raster image. These files essentially serve as digital blueprints, utilizing CCITT Group 4 compression to store high-resolution, monochrome (1-bit) scans of engineering drawings and architectural plans. Because they are designed for legacy document management systems like Trix DrawingCenter or specific workflows involving Bentley Systems, they are notoriously difficult to open on modern operating systems. They lack native support in standard viewers like Windows Photos or macOS Preview, and their monochrome nature means they often appear inverted or distorted if forced open in incompatible software.
A secondary but significant format using this extension is the T-FLEX CAD fragment file by Top Systems. These are vector-based 3D model parts rather than raster images, creating a frustrating ambiguity for users. If your file is a scan, you need a raster converter; if it is a 3D part, you need CAD software.
To make these files usable, the best strategy is conversion. For archiving and sharing engineering scans, convert .tg4 to PDF or TIFF to preserve the high-detail monochrome data without the compatibility headaches. For casual viewing, converting to PNG or JPG is effective, though you may lose the crispness of fine lines found in the original Group 4 compression. Just drag and drop to determine the format, view, and convert it.
Use Convert.Guru to open and convert your TG4 file.
Users also converted WEBP, FH, PC1 and DXG files.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our TG4 converter.